Improvement in knob-latches



A. HE'YSE.

Knob-Latches.

Patented August 12 1873.

Inventor: 095 f hZZf Per

Attorneys.

Witnessesi AM, PHOTO-U'IHOGRAPHIC c0 mqassams macaw.)

UNITED STATES AUGUST HEYSE, OF TERRE HAUTE, INDIANA.

IMPROVEMENT IN KNOB-LATCHES.

Specification forming part of Letters Patent No. 141,714, dated August12, 1873; application filed April 12, 1873.

To all whom it may concern:

Be it known that I, AUGUST HEYSE, of Terre Haute, in the county of Vigoand State of Indiana, have invented a new and Improved Knob-Latch, ofwhich the following is a specification:

1n the accompanying drawing, Figure 1 represents a vertical elevation ofmy knob-latch as placed in the door, and Fig. 2 is a horizontallongitudinal section of the same on the line 0 c, Fig. 1.

Similar letters of reference indicate corresponding parts.

The object of my invention is to furnish an improvement in the class ofdoor-locks having a sliding spindle with wedge-shaped pieces attached toit. The invention consists in the arrangement of guide-pieces inconnection with the bolt and spindle, as hereinafter described.

In the drawing, A represents the door, into which is fitted suitably thelock-plates B, which carry between them the latch-bolt O, band-springl), and, transversely, the doorspindle E, having knobs F, and washers l.The plates B are connected by screws and supports a in suitable manner,and provided with slotted perforations for the passage of door-spindleE. The straight piece 12, guides, in connection with the edge ofrectangular piece cl applied to plate B, the bolt 0, guidepiece dembracing also partly knob-spindle E. Band-spring D is coiled around astud, f, of plate B, which is flanged and riveted or screwed toface-plate g of the lock. ,The latchbolt (3 consists of three parts:Head h, shank t, and wedge extension r. The head h is considerablylarger than the shank part, and is acted upon at its rear side by theend of bandspring D. The wedge part It extends sidewise in a right anglefrom shank z, forming, with guide-piece d, a square aperture for theknob-spindle E. Two wedge-projections, G, are placed centrally, but inopposite directions, on spindle E, and act from both sides on wedgeextension k of bolt 0. The latter is, therefore, pressed back Whetherthe knob is pressed or pulled, opening thereby the door. Spring Dpresses bolt 0 forward again as soon as the knob is released. The wholelock is let into the door, which is provided, as well as side face plate6, with slotted perforations, like plates B, being compactly arrangedtherein, and may be furnished cheaply on account of the simplicity ofits construction.

Having thus described myinvention, I claim as new and desire to secureby Letters Patcut- The rectangular guide-piece d, and the extensionpiece K of the bolt embracing the spindle E, and the straightguide-piece b in combination therewith, all as shown and described.

AUGUST HEYSE.

Witnesses SIMON HIRSOH, HAJO F. REINERs.

